//package com.example.common.util;
//
//import javax.servlet.http.HttpServletRequest;
//import java.net.InetAddress;
//import java.net.UnknownHostException;
//
///**
// * 请求工具类
// * Created by macro on 2020/10/8.
// */
//public class RequestUtil {
//
//    /**
//     * 获取请求真实IP地址
//     */
//    public static String getRequestIp(HttpServletRequest request) {
//        //通过HTTP代理服务器转发时添加
//        String ipAddress = request.getHeader("x-forwarded-for");
//        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
//            ipAddress = request.getHeader("Proxy-Client-IP");
//        }
//        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
//            ipAddress = request.getHeader("WL-Proxy-Client-IP");
//        }
//        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
//            ipAddress = request.getRemoteAddr();
//            // 从本地访问时根据网卡取本机配置的IP
//            if (ipAddress.equals("127.0.0.1") || ipAddress.equals("0:0:0:0:0:0:0:1")) {
//                InetAddress inetAddress = null;
//                try {
//                    inetAddress = InetAddress.getLocalHost();
//                } catch (UnknownHostException e) {
//                    e.printStackTrace();
//                }
//                ipAddress = inetAddress.getHostAddress();
//            }
//        }
//        // 通过多个代理转发的情况，第一个IP为客户端真实IP，多个IP会按照','分割
//        if (ipAddress != null && ipAddress.length() > 15) {
//            if (ipAddress.indexOf(",") > 0) {
//                ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
//            }
//        }
//        return ipAddress;
//    }
//
//}